Who is Kendrick Lamar talking about on "The Heart Part 4?" It's a question that a lot of rap fans have been asking since the song dropped early this morning (March 24).

For the most part, it seems that a lot of people believe K Dot is speaking to Big Sean in the cut, but others believe he's talking about Drake. Of course, there have been rumors that Kendrick and Drizzy haven't seen eye-to-eye since the TDE artist dropped that "Control" verse, and some believe they've been throwing subliminals at each other ever since. So it only makes sense that Lamar's fans would harass Drake in some way, and they did it by putting the number "IV" all over his Instagram page. That eventually started a back-and-forth between both rappers' fan bases.

Funny enough, just last week it was Drake fans that trolled Meek Mill in a similar manner following the release of More Life. Drizzy's fans went on Meek's Instagram and dropped the More Life flower emoji all over his comment section.

Hopefully, Mr. Lamar will reveal who he's speaking about next month when he drops his new release. "Ya'll got 'til April the 7th to get your sh-- together," he spit in "The Heart Part 4."

Until then, you can see what Kendrick's fans did to Drizzy's page below.